6o6 



INDEX 



Stock, see Colony 

 Stomach, 22, 70, 357, 386, 429, 495 

 Stomodaeum, 204, 358, 429, 431 

 Struggle for existence, 225 

 Substitution of organs, '209 

 Sucker, 203 



Supporting lamella, see Mesogloea 

 Suprarenals, see Adrenals 

 Suspensorum, 40, 422 

 Sutures, 50, 470 ~ 

 Swimmeret, see Pleopod 

 Symbiosis, 299 

 Sympathetic, see Nerves 

 Symphysis, 486 

 Syn-cerebrum, 366 

 Synovial capsule, 56 

 Systemic arch, fo, 436, 506 

 Systole : of heart, 90 ; of contractile 

 vacuole, 266 



T. 



actile organs, 179, 368, 394, 516 

 Tadpole, 9, 203 et seq. 

 Tail, 9, 209, 406, 416, 468 

 Tapetum, S39 

 Tarsus, 51, 487 

 Ta^te-organs, 180, 492, 517 

 Teasing, directions for, 123 

 Teats, 468, 489 

 Teeth, 17, 358, 428, 468, 492 

 Teleostomi, 415 

 Telson, 347 

 Tendon, 59 



Tentacles, 290, 291, 304 

 Tergum, 347 

 Testis, see Spermary 

 Thalamencephalon, see Dience- 



phalon 

 Thigh, 5 



Thoracic duct, 511 

 Thorax, 347, 467, 489 

 Thread-cell, see Nematocyst 

 Thymus, 431, 490, 503 

 Thyroid, 431, 503 

 Thyroid cartilage, 500 

 Tibia, 51, 487 



Tibio-fibula, 51 



Toad, see Bufo 



Toes, see Digits 



Tissues, enumeration of, 31 



Tongue, 8, 17, 429, 492 



Tongue-cartilage or bone, see Hyoid 



Tonsil, 490 



Trachea, 489, 500 



Trabecule cranii, 577 



Transverse process, see Vertebra 



Trichocyst, 267 



Triploblastic 306, 314, 324 



Trochanter, 487 



Trochosphere, 340 



Trophoblast, 565 



Trunk, 4, 416, 468 



Trypsin, 74 



Tubercle, and Tubercular facet, 481, 



483 

 Tunicata, 406 

 Turbinals, 476, 517 

 Tympanic cavity, membrane, and 



ring, 5, 45, 189, 433, 475, 519 

 Typhlosole, 327, 386 



U 



u. 



Ina, 50, 485 

 Umbihcal cord, 584 

 Umbilicus, 584 

 Umbo, 383 

 Umbrella, 307 

 Unicellular, 231 

 Unio, see Mussel 

 Urachus, 584 

 Urea, 66, 147 

 Ureter, 26 ; and see under various 



types 

 Urethra, see Urinogenital canal 

 Uric acid, 66 

 Urinary bladder, 23, 361, 390, 521 



,, tubules, see Nephridium 

 Urine, 8, 66, 147 

 Urinogenital aperture, 469 

 canal, 522, 523 



,, duct, 194 



„ organs, 193, 450, 520 



